plant viruses
Structure and AssemblyNear-Atomic-Resolution Cryo-Electron Microscopy Structures of Cucumber Leaf Spot Virus and Red Clover Necrotic Mosaic Virus: Evolutionary Divergence at the Icosahedral Three-Fold AxesMembers of the Tombusviridae family have nearly identical shells, and yet they package genomes that range from 4.6 kb (monopartite) to 5.3 kb (bipartite) in size. To understand how this genome flexibility occurs within a rigidly conserved shell, we determined the high-resolution cryo-electron microscopy (cryo-EM) structures of cucumber leaf spot virus and red clover necrotic mosaic virus. In response to genomic size differences...
Virus-Cell Interactions | SpotlightTurnip Mosaic Virus Is a Second Example of a Virus Using Transmission Activation for Plant-to-Plant Propagation by AphidsTransmission activation, i.e., a viral response to the presence of vectors on infected hosts that regulates virus acquisition and thus transmission, is an only recently described phenomenon. It implies that viruses contribute actively to their transmission, something that has been shown before for many other pathogens but not for viruses. However, transmission activation has been described so far for only one virus, and it was unknown...
Genome Replication and Regulation of Viral Gene Expression | SpotlightStrawberry Mottle Virus (Family Secoviridae, Order Picornavirales) Encodes a Novel Glutamic Protease To Process the RNA2 Polyprotein at Two Cleavage SitesMany viruses encode proteases to release mature proteins and intermediate polyproteins from viral polyproteins. Polyprotein processing allows regulation of the accumulation and activity of viral proteins. Many viral proteases also cleave host factors to facilitate virus infection. Thus, viral proteases are key virulence factors. To date, viruses with a positive-strand RNA genome are only known to encode cysteine or serine proteases,...
Structure and AssemblyEncapsidation of Viral RNA in Picornavirales: Studies on Cowpea Mosaic Virus Demonstrate Dependence on Viral ReplicationThe mechanism whereby members of the order Picornavirales specifically package their genomic RNAs is poorly understood. Research with monopartite members of the order, such as poliovirus, indicated that packaging is linked to replication, although the presence of “packaging signals” along the length of the viral RNA has also been suggested. Thanks to the bipartite nature of the CPMV genome, which allows the manipulation of RNA-...
- Structure and AssemblyAsymmetric Trimeric Ring Structure of the Nucleocapsid Protein of Tospovirus
- Pathogenesis and Immunityrgs-CaM Detects and Counteracts Viral RNA Silencing Suppressors in Plant Immune Priming
- Genetic Diversity and EvolutionDiversity, Distribution, and Evolution of Tomato Viruses in China Uncovered by Small RNA Sequencing
- Structure and Assembly | SpotlightStructure of Flexible Filamentous Plant Viruses
- Virus-Cell InteractionsTriple Gene Block Protein Interactions Involved in Movement of Barley Stripe Mosaic Virus